http://api.tweetmeme.com/imagebutton.gif?url=http://sports.espn.go.com/nba/news/story?id=6530352&campaign=rss&source=NBAHeadlines (http://api.tweetmeme.com/share?url=http://sports.espn.go.com/nba/news/story?id=6530352&campaign=rss&source=NBAHeadlines&service=bit.ly&source=espn)The proposal from NBA owners that the players association rejected last week called for the implementation of a hard salary cap at a figure lower than the league's current cap, but not until 2013-14, according to sources familiar with the offer.